Heat Exhaustion - Causes, Signs, Symptoms, Risk Factors, Manage and Prevention

Introduction:

There are three major heat-related illnesses: heat cramps, heat exhaustion, and heatstroke. Heat cramps are the mildest of these three, while heat stroke might be life-threatening. Heat exhaustion is a moderate form of other heat-related illnesses. This condition occurs when the body is exposed to too much heat.

What Exactly Is Heat Exhaustion?

Heat exhaustion is a not-so-rare yet preventable condition of the body that occurs when a person is exposed to high heat levels. This condition occurs especially when high humidity meets high levels of heat, accompanied by high-intensity physical activities. Heat exhaustion is more often seen with dehydration. Fortunately, this condition is preventable and is not life-threatening as heat stroke. However, unmanaged heat exhaustion might lead to heatstroke, which might be fatal.

What Causes Heat Exhaustion?

Our body has its air conditioning system: sweat. When exposed to high temperatures, the body cools itself by sweating. Sweating causes the loss of some water and sodium. When exposed to high heat and humidity while doing physical activity, it becomes too much for the body to handle. It struggles to cool down, resulting in symptoms like dizziness, fatigue, cramps, etc. This condition is called heat exhaustion.

How Common is Heat Exhaustion?

Heat exhaustion is relatively common, especially in hot and humid climates or during heatwaves. It can affect people of all ages but is more prevalent in individuals not acclimatized to high temperatures or who engage in strenuous physical activity outdoors without proper hydration and rest. Groups at higher risk include the elderly, young children, athletes, outdoor workers, and individuals with certain medical conditions. Taking precautions such as staying hydrated, seeking shade, and avoiding strenuous activity during peak heat hours can help prevent heat exhaustion.

What Are the Risk Factors of Heat Exhaustion?

Heat exhaustion is more common than one might think. It happens when people overexert themselves in high-intensity sports or workouts at high temperatures and humidity. In addition, heat exhaustion occurs when the body finds it hard to cool itself down.

Following are some of the risk factors for heat exhaustion:

• Age: Kids below four and older adults above 65 struggle to cope with high heat and humidity. Therefore, they are at a higher risk of suffering from heat exhaustion.

• Excessive Alcohol Intake: Excess intake of alcohol generally leads to dehydration. It also makes it hard for the body to regulate temperatures, which, as a result, might lead to heat exhaustion.

• Over-Exertion: People who overexert themselves with high-intensity sports or workouts during a hot day are at a higher risk of developing heat exhaustion. Also, if a person who usually plays or exercises in a cooler environment is suddenly exposed to high heat and humid conditions, they may develop heat exhaustion. Also, wearing heavy clothes during high temperatures leads to heat exhaustion.

• Medications: Certain medications, such as antihypertensives (beta-blockers), diuretics (medications prescribed to help heart failure, which reduce the amount of fluid in the body, which might lead to dehydration), and chemotherapy drugs (drugs that treat cancer), can cause heat exhaustion. Some commonly prescribed medications can also cause symptoms like vomiting, diarrhea, and dehydration. Such drugs may lead to heat exhaustion.

• Obesity: People who are obese (overweight) are at a higher risk of developing heat exhaustion, especially when exposed to high temperatures.

What Are the Signs and Symptoms of Heat Exhaustion?

The signs and symptoms of heat exhaustion might start slowly and then progress to heat stroke if not treated soon.

Following are the primary two types of heat exhaustion and their common signs:

Other common signs and symptoms are as follows:

• Dizziness.

• Lightheadedness.

• Headache.

• Fever (increased body temperature).

• Excessive sweating.

• Moist and cold skin.

• Fatigue.

• Tiredness.

• Confusion.

• Nausea.

• Vomiting might occur in some.

• Rapid, weak pulse.

• Muscle cramps.

• Abdominal cramps.

• Dark-colored urine (a common sign of dehydration).

• Fainting (syncope).

• Low blood pressure (while standing up).

• Rapid shallow breath.

• Pale skin.

• Heat edema (swollen ankles and feet can occur).

How to Manage Heat Exhaustion?

If a person experiences any of the symptoms mentioned above, make sure to follow the below-mentioned steps:

• Rehydrate with plenty of water and juice throughout the day (avoid caffeine or alcohol-containing drinks).

• Moving to a shady place when outdoors or moving to an air-conditioned space is better if present.

• Remove unnecessary pieces of clothing if overdressed.

If the symptoms persist for more than one hour or worsen, consult a doctor immediately.

How to Prevent Heat Exhaustion?

Following are the few steps to prevent or r loved ones from heat exhaustion,

• When going out for sports or workouts during hot summers, wear loose-fitting, airy garments. Avoid layering too many garments to increase body temperature.

• Applying sufficient sunscreen with a minimum of SPF 30 is a must to prevent sunburns.

• If a sportsperson carries adequate water or electrolyte-rich sports drinks to have in between sports, this will help prevent dehydration.

• Take reasonable notice if experience any heat-related problems after starting any medication. If so, consult a doctor immediately to change the dosage or the drug.

• A person with a recent history of heat exhaustion might be sensitive to high temperatures for a few weeks after the episode. Therefore, take precautions to avoid scorching conditions.

• Avoid excessive drinking of caffeinated beverages or alcohol, as it may lead to dehydration.

What Are the Complications of Heat Exhaustion?

If not addressed promptly, heat exhaustion can lead to various complications. These can include dehydration, electrolyte imbalances, heatstroke, heat-related illnesses (if left untreated), and even organ damage in severe cases. Recognizing the symptoms and seeking medical attention if someone is experiencing heat exhaustion is essential.

Conclusion:

Though heat exhaustion is not as severe as heat stroke, delayed care might cause the progression of this condition to heat stroke. The good news is that heat exhaustion and most heat-related illnesses can be prevented by following preventive measures. Stay hydrated during hot summer seasons and wear climate-appropriate clothes to reduce the risk of developing heat-related illnesses. If the symptoms mentioned are experienced for an extended period or often, visit the general physician to avoid further complications.